86%(43)37 out of 43 people found this document helpful
This preview shows page 20 - 22 out of 25 pages.
164) The CAP region of mRNA is necessary for ________ of translation.A) transcriptionB) terminationC) initiationD) propagationE) accuracyAnswer: C165) What are the tRNA binding sites on the ribosome called?166) What modifications made to mRNA function to prevent its degradation in the cytoplasm by exonucleases?167) Proteins tagged with the polypeptide ________ are targeted for degradation by a protein complex called aproteasome.168) Within the nucleus, chromosomes are coiled around which proteins?A) proteasomesB) chromatidsC) intronsD) histonesE) histaminesAnswer: D
169) What is the proper order of the five phases of mitosis?
28171) Disulfide bridges contribute to the tertiary structure of proteins by covalent bonds between the sulfhydrylgroups on two cysteine amino acids.172) Cholesterol is the precursor molecule for all steroids in the body.173) Glycoproteins have a glycogen molecule covalently bound to a protein.Answer: True False174) Cyclic nucleotides form ring structures due to the covalent bonding between an oxygen of the phosphategroup and a carbon of the carbohydrate.175) Thymine is a pyrimidine.176) Guanine and cytosine are held together by two hydrogen bonds.177) Inclusions are intracellular stores of glycogen or triglycerides.Answer: True False178) The innermost compartment of a mitochondrion is called the matrix.179) Vaults direct the development of the mitotic spindle during cell division.180) The cytoskeleton suspends the organelles within the cytoplasm.181) Movement between cells in an epithelium is called transepithelial transport.Answer: True False182) Anabolism describes the breakdown of large molecules to smaller molecules.183) Every adenine nucleotide of DNA will be transcribed into a thymine on the mRNA.
184) The exon is cut from the original mRNA sequence, leaving the intron as the portion of mRNA that leaves the
nucleus to be translated into a protein.
185) The mRNA codon UUU codes for the amino acid phenylalanine. Therefore, no other codon can code for